Tuesday - December 23, 2025
USGS Report Maps Magmatic Gas Signals at Lassen Volcanic Center
December 16, 2025
WASHINGTON, Dec. 16 (TNSLrpt) -- The U.S. Geological Survey has released Open-File Report 2025-1056, titled 'Gas Chemistry and Isotope Data for Volcano Monitoring at the Lassen Volcanic Center, Lassen Volcanic National Park,' by Deborah Bergfeld, Jennifer L. Lewicki, Sara E. Peek, and Andrew G. Hunt, providing the most comprehensive helium isotope dataset yet compiled for the northern California volcano. Issued in 2025 from the agency's Reston, Virginia, offices, the report presen . . .

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